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Simulated product dispenser

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ATParser Class Reference
Public Member Functions

ATParser Class Reference

Parser class for parsing AT commands. More...

#include <ATParser.h>

Public Member Functions

 ATParser (BufferedSpi &serial_spi, const char *delimiter="\r\n", int buffer_size=1440, int timeout=DEFAULT_SPI_TIMEOUT)
 Constructor.
 ~ATParser ()
 Destructor.
void setTimeout (int timeout)
 Allows timeout to be changed between commands.
void setDelimiter (const char *delimiter)
 Sets string of characters to use as line delimiters.
bool send (const char *command,...)
 Sends an AT command.
bool recv (const char *response,...)
 Receive an AT response.
int putc (char c)
 Write a single byte to the underlying stream.
int getc ()
 Get a single byte from the underlying stream.
int write (const char *data, int size_of_data, int size_in_buff)
 Write an array of bytes to the underlying stream assuming the header of the command is already in _txbuffer.
int read (char *data)
 Read an array of bytes from the underlying stream.
int printf (const char *format,...)
 Direct printf to underlying stream.
int scanf (const char *format,...)
 Direct scanf on underlying stream.
void oob (const char *prefix, mbed::Callback< void()> func)
 Attach a callback for out-of-band data.
void flush ()
 Flushes the underlying stream.
void abort ()
 Abort current recv.
bool process_oob (void)
 Process out-of-band data.
int get_size (void)
 Get buffer_size.

Detailed Description

Parser class for parsing AT commands.

Here are some examples: 

 ATParser at = ATParser(serial, "\r\n");
 int value;
 char buffer[100];

 at.send("AT") && at.recv("OK");
 at.send("AT+CWMODE=%d", 3) && at.recv("OK");
 at.send("AT+CWMODE?") && at.recv("+CWMODE:%d\r\nOK", &value);
 at.recv("+IPD,%d:", &value);
 at.read(buffer, value);
 at.recv("OK");

Definition at line 48 of file ATParser.h.

Constructor & Destructor Documentation

ATParser ( BufferedSpi &  serial_spi,
const char *  delimiter = "\r\n",
int  buffer_size = 1440,
int  timeout = DEFAULT_SPI_TIMEOUT 
)

Constructor.

Parameters:
serialspi interface to use for AT commands
buffer_sizesize of internal buffer for transaction
timeouttimeout of the connection
delimiterstring of characters to use as line delimiters

Definition at line 45 of file ATParser.cpp.

~ATParser (  )

Destructor.

Definition at line 84 of file ATParser.h.

Member Function Documentation

void abort (  )

Abort current recv.

Can be called from oob handler to interrupt the current recv operation.

Definition at line 448 of file ATParser.cpp.

void flush (  )

Flushes the underlying stream.

Definition at line 66 of file ATParser.cpp.

int get_size ( void   )

Get buffer_size.

Definition at line 240 of file ATParser.h.

int getc (  )

Get a single byte from the underlying stream.

Returns:
The byte that was read or -1 during a timeout

Definition at line 61 of file ATParser.cpp.

void oob ( const char *  prefix,
mbed::Callback< void()>  func 
)

Attach a callback for out-of-band data.

Parameters:
prefixstring on when to initiate callback
funccallback to call when string is read
Note:
out-of-band data is only processed during a scanf call
int printf ( const char *  format,
  ... 
)

Direct printf to underlying stream.

See also:
printf
Parameters:
formatformat string to pass to printf
...arguments to printf
Returns:
number of bytes written or -1 on failure

Definition at line 400 of file ATParser.cpp.

bool process_oob ( void   )

Process out-of-band data.

Process out-of-band data in the receive buffer. This function returns immediately if there is no data to process.

Returns:
true if oob data processed, false otherwise
int putc ( char  c )

Write a single byte to the underlying stream.

Parameters:
cThe byte to write
Returns:
The byte that was written or -1 during a timeout

Definition at line 56 of file ATParser.cpp.

int read ( char *  data )

Read an array of bytes from the underlying stream.

Parameters:
datathe destination for the read bytes
sizenumber of bytes to read
Returns:
number of bytes read or -1 on failure

Definition at line 98 of file ATParser.cpp.

bool recv ( const char *  response,
  ... 
)

Receive an AT response.

Receives a formatted response using scanf style formatting

See also:
scanf

Responses are parsed line at a time. Any received data that does not match the response is ignored until a timeout occurs.

Parameters:
responsescanf-like format string of response to expect
...all scanf-like arguments to extract from response
Returns:
true only if response is successfully matched

Definition at line 427 of file ATParser.cpp.

int scanf ( const char *  format,
  ... 
)

Direct scanf on underlying stream.

See also:
scanf
Parameters:
formatformat string to pass to scanf
...arguments to scanf
Returns:
number of bytes read or -1 on failure

Definition at line 409 of file ATParser.cpp.

bool send ( const char *  command,
  ... 
)

Sends an AT command.

Sends a formatted command using printf style formatting

See also:
printf
Parameters:
commandprintf-like format string of command to send which is appended with a newline
...all printf-like arguments to insert into command
Returns:
true only if command is successfully sent

Definition at line 418 of file ATParser.cpp.

void setDelimiter ( const char *  delimiter )

Sets string of characters to use as line delimiters.

Parameters:
delimiterstring of characters to use as line delimiters

Definition at line 109 of file ATParser.h.

void setTimeout ( int  timeout )

Allows timeout to be changed between commands.

Parameters:
timeouttimeout of the connection

Definition at line 99 of file ATParser.h.

int write ( const char *  data,
int  size_of_data,
int  size_in_buff 
)

Write an array of bytes to the underlying stream assuming the header of the command is already in _txbuffer.

Parameters:
datathe array of bytes to write
size_of_datanumber of bytes in data array
size_in_buffnumber of bytes already in the internal buff
Returns:
number of bytes written or -1 on failure

Definition at line 76 of file ATParser.cpp.

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